(This may have been Hickok's attempt to stealth-grab a Govt. scope bid.. but there were a few others who tried.)

Tek placed a hole? bracket? somewhere--which had no function. H.'s 'Model' duplicated that McGuffin, along with most-else.
Would love to find the transcript/hear H.'s testimony "as to its purpose", but know-not enough even to search for it. Tek won their case.

(I have seen pics of the ringer, though; guts not remotely akin to Tek's internal quality.)
Tek, after all, had their own ceramic-fab, eventually made their mostly-ceramic CRTs from scratch (and each one is a Jewel, all by itself, to the informed eye.)
They invented ceramic terminal strips with tinned-notches (silver-bearing solder required) to the visual effect of neatly laid out components and elaborate wiring harnesses.
Everything worked, but was also beautiful to see!

(Never again.. in the world of 'Manufacturing'. New stuff will have half-lives. 50 yo early Tek vacuum-tube models still work. In CAL.)
But that 'Tektronix' is also Gone forever, despite the name persisting.

Nothing is quite what it seems, and if the details matter, you still have to triple-check 'twixt advertised and actual 'quality'. Ads Still LIe, it is immanent in them.

(While this has always been ~the case, methinks it's getting worse)--not 'clearer'--despite all this 'transparency' cliche. :-/